Does light cause internal cancers? The problem and challenge of an ubiquitous exposure.
: Visible light of sufficient intensity and duration inhibits melatonin biosynthesis, and experimental studies suggest that melatonin may protect against cancer. From a public health point of view it is important to verify or falsify the hypothesis that artificial light--or even sunlight itself--suppresses melatonin production sufficien.....
Citation
Portier C. Comments on the International Symposium on Light, Endocrine Systems and Cancer. Neuro Endocrinol Lett. 2002 Jul; 23(Suppl 2): 79-81